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Show 452 MR. G. B. SOWERBY ON MADAGASCAR LAND-SHELLS. [May 6, Fig. 13. Erigone dybowskii $ , p. 449. a, profile; b, Spider from above, without legs; c, cephalothorax; cl, ditto, from the front; e, f palpi, in two positions; g, natural length of Spider. 14. Erigone subrostrata <? , p. 450. a, profile; b, cephalothorax, from the front; c, d, palpi, in two positions ; c, natural length of Spider. 2. On three new Species of Land-Shells from Madagascar. By G. B. SOWERBY, jun. [Eeceived March 18, 1873.] 1. CYCLOSIOMA (TROPIDOPHORA) SUFFUSUM, sp. nov. Testa globoso-turbinata, obtecte umbilicata, rufo c cer ul esc ent e suffusa, versus apicem aurantiaca, plus minusve obscure purpureo fasciata ; anfractibus undique spiraliter striatis, ultimo circa umbilicum lirato ; apertura oblique circulari; fauce rufo-prui-nosa ; labro expanso, sanguineo ; operculo calcareo, piano. A Cyclostoma of ordinary type, belonging to the section Tropidophora, Trosc, with rounded whorls, without keels, throughout regularly spirally striated, with an expanded red lip and plum-coloured interior, yellowish towards the apex ; whorls more or less obscurely banded with purple, and the body-whorl suffused with red, which increases in intensity towards the mouth. 2. CYCLOSTOMA VEXILLUM, sp. nov. Testa ovato-turrit a, anyustissime umbilicata, tenui, flavescente, atro lineata et unifasciata ; anfractibus convexis, leevibus vel concentrice minutissime striatis; apertura circulari, labro tenuiter expanso ; operculo calcareo, piano. A pretty little species, of simple characters, elevated spire, very small umbilicus, thin substance, and yellowish colour, with a black band on the lower part of the whorls, from one to three narrow linear bands above and two round the umbilicus. 3. CYCLOSTOMA (TROPIDOPHORA) PERSPECTIVUM, sp. nov. Testa depresso-turbinata, patentissime umbilicata, pallide rufo-fusca; spira depressiuscula; anfractibus anguste rotundatis, superne spiraliter obtuse liratis, concentrice decussate striatis, medio obsolete striatis, latissime unicarinatis, ultimo circa umbilicum valide lirato ; apiceplumbeo ; apertura subcirculari; labro rufo-brunneo, late expanso reflexo, superne producto; operculo calcareo, piano. A very widely umbilicated species, with a broad keel, of a uniform light reddish-brown colour ; upper part of the whorls decussated, strongly corded round the umbilicus ; lip deep reddish-brown, expanded and reflected, produced at the upper part. |
